Die-casting machine



Dec. 18, 1923. 11,478,111?

' w. A. HEINZE DIE CASTING MACHINE Filed Dec. 12 1921 8 Sheets-Sheet 1INVENT R'.

Wwdrflf w BY Q 2 m 4 TTORNEY.

Dec 18, 1923.

w. A. HEINZE DIE CASTING MACHINE Filed Dec. 12. 1921 8 Sheets-Shet 2Dec, 18,1923. 11,478,117

W. A. HEINZE DIE CASTING MACHINE A TTORNE Y.

Dec. 18, 1923.

W. A. HEINZE DIE CASTING MACHINE Filed Dec. 12 1921 8 SheetSheec 4 Nbx ll I I 1 \l INVEN TOR.

ATTORNEY.

10. 18,1923. mwm

W. A. HEINZE DIE CASTING MACHINE Filed Dec. 12. 1921 8 Sheets-Sheet 5Dec. 18,1923. 4 1,47%,1137

W. A. HEINZE DIE CASTING MACHINE Filed Dec. 12 1921 8 Sheets-Sheet 6 m G1 Nl EX TOR.

ATTORNEY.

11 47831117 w. A. HEINZE DIE CASTING MACHINE Filed Dec. 12 1921 8Sheets-Sheet 8 ATTORNEY.

Patented Dec. I8, I923, v

s eaten-r creme WILLIAM A HEINZE, OF CHICAGO, ILLINOIS, ASSIGNOR'TOCRANE COMPANY. OF

' CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS. I

DIE-CASTING: MACHINE.

Application filed December 12, 1921. Serial No. 521,608.

To all whom it may concern: apparatus of novel construction adapted toto Be it known that I, WILLIAM A. HEINZE, be quickly and easily put intoand out of opa citizen of the United States, residing at oration and tobe adjusted so that the cores Chicago, in the county of Cook and Stateof may be pulled either independently or in 5 Illinois, have inventedcertain new and useunison and either before or during separafulImprovements in Die-Casting Machines, tion of the dies. as

of which the following is a; specification. My invention alsocontemplates novel This invention relates to die-casting mameans foreffecting quick injection of the chines, and has more particularreference to molten metal into the mold; also the provilo a verticalmachine, so called by reasonof its sion of an improved clamping andlocking general design characterized by vertically device for thecharging door of the meltco separable die'members. ing pot.

One of the primary objects is to provide I have further aimed to providea. practia generally im roved die-castin machine by cal and effectivemeans for controlling the means of whic a superior gra e of castingsvarious operations and to this end I prefer may be economically andefliciently proto employ a fluid-pressure operated mechaca duced. nismincluding a fluid pressure clutch and In furtherance of this'generalobject, my fluid pressure valve mechanism. The valve inventioncontemplates mounting the die mechanism is controlled in part by manualmembers in novel relation to the melting pot, operation and in part bycams. The opwhereby neither said die members nor the erator starts themachine by means of the die-supporting frame is subjected to heat manualcontrol, and the several operations from the melting pot. In thisregard, prior will 'b automatically performed in the machines areobjectionable in that one or proper sequence under control of thecammore die members are located either above or operated valvemechanism, and the machine in contiguous relation to the melting pot andwill be automatically stopped at the end of 7c become heated thereby.This heating of the "a cycle. In this connection, I have aimed to diemembers is inimical to efficient producprovide an improvedfluid-pressure clutch. tion of castings. The present invention, Otherobjects and attendant advantages so therefore, insures the mostdesirable tem will be appreciated by tho-se'skilled in this pcrature foreconomica production of high art as the invention becomes better undernograde castings. V stood by reference to the following descrip- Moreparticularly, my invention provides tion when considered in connectionwith the a die-casting machine characterized by a staaccompanyingdrawings, in which to tionary melting pot and accessories, and a Figure1 is a side elevation of the control horizontally movable carriageequipped with side of a die-casting machine embodying my separable diemembers adapted to be closed invention showing the parts in the idleposiand opened and to be moved into and outof tion and the melting potin section; nozzle tension position by suitable mecha- Fig. 2 is asimilar side elevation, but showon nism. Inasmuch as the dies andcarriage are ing the die carriage moved forwardly to the remote from themelting pot the most desirnozzle t nsion position; so able dietemperature is insured. Fig. 3 is across sectional view through Otherobjects reside in the provision of the melting pot taken on the line 3-3of novel mechanism for opening and closing Fig. 2; 45 the die membersand for feeding the die car- Fig. 4 is a plan view of the machine asriage to and from the nozzle tension posishown in Fig. 2, omitting thecore-pulling tion in which a-charge of molten metal is mechanism;injected into the mold formed by the dies, Fig. 5 is an elevation of theside of the Another object is to provide a core-pulling machine oppositefrom that shown in Fig. 2;

Figs. 6 and 7 are developments of the die closing and opening cam and ofthe die carriage cam, respectively;

Fig. 8 is an end elevation looking at the melting pot end of themachine;

Fig. 9 is a horizontal sectional view taken substantially on the line9-9 of Fig. 2;

Fig. 10 is a detail view of the core-pulling cam shown in Fig. 9;

Fig. 11 is a detail section of the metal feed cam taken on the line11-11 of Fig. 5;

Fig. 12 is a fragmentary end view as taken on the line 12-12 of Fig. 9;

Fig. 13 is a fragmentary sectional view taken substantially on the line13-13 of Fig. 9;

Figs. 14, 15 and 16 are diagrammatic views showing different positionsof the clutch shifting valves, the section through the four-way valvebeing taken on the line 14-14. of Fig. 2;

Fig. 17 is an enlarged sectional view taken on the line 17-17 of Fig. 9;

Fig. 18 is an enlarged section through the air injector valve takensubstantially on the line 18-18 of Fig. 4;

Fig. 19 is an enlarged sectional view through the automatically operatedclutchcontrol valve taken substantia'ly on the lines 19-19 of Figs. 4and 20;

' Figs. 20 and 21 are sectional views taken on the lines 20-20 and21-21, respectively, of Fig. 19; and

Fig. 22 is an enlarged sectional view taken substantially on the line22-22 of Fig. 4.

In the present embodiment of my invention characterized by a so-calledvertical machine, the melting pot and its accessories, and the diemembers and their supporting means and cooperating parts arerespectively located and independently mounted on a bed, but adapted forcooperation in a particularly advantageous manner. The main drivingmechanism is aso located on the base, so that in effect, there are threedistinct groups of mechanism. so co-ondinated however, as to produce acomplete cycle of operations, resulting in the production of a diecasting. These groups of mechanism will be described in the order named.4

Referring first to the metal melting po and appurtenant parts, it willbe observed that-this group is mounted on a supporting bracket 26, inturn rigidly mounted on one end of a heavy cast iron base 27. Upon thesupport 26 is mounted a suitable fire box 28 lined with fire brick andcarrying a melting pot designated generally by 29. The melting pot has aflanged edge 31 resting on the top of the fire box '28 and the open topof the pot is closed by a cover 32 having a charglng opening 33 adaptedto be closed by'a door 34. I propose to firmly damp and lock thischarging door in closed position to positively prevent admission of airto the melting pot and consequent oxidation of the metal. As shown, thedoor 34 is pivotally supported at 35 by a pair of levers 36 fixed to arock shaft 37 mounted on the cover 32 and forming a fulcrum for thelevers. One end of the shaft 37 is extended to provide a cranked handle38 by means of which the charging door may be swung back and forth. Tothe outer end of each lever 36 is pivoted a clamping lever 39 having aneccentric finger 41 engageable with a latch 42 for clamping and lockingthe charging door in closed position, as will be obvious. By swingingthe clamping levers 39 upwardly, they will be released from the latches,permitting the hand crank 38 to be operated for opening the chargingdoor. The levers when swung upwardly are supported by stops 40 above andout of contact with the cover 34.

The melting pot may be heated by any suitable means, such for examp'e asgas burners 43, a series of which are mounted in the fire box beneaththe melting pot, each equipped with an individual valve 44 connectedwith a cross-head mixture supply pipe 45. The proper gas mixture isobtained by mixing gas from pipe 45 with air from pipe 45 in the T 45. Adoor 46 is provided at one side of the fire box for inspection of theburners.

The melting pot is shaped to provide a goose neck pressure chamberdesignated generally by 47, having a centrally disposed pressure inletend 48, to which is connected a fluid pressure (preferably air) supplypipe 49, and the opposite end of the chamber terminates in a restricteddischarge opening 51, to which is connected a metal injecting nozzle 52adapted to align with the dies to be later described. A metal flow valvein the form of a punger 54 is adapted to be moved vertically by a lever55 above the melting pot for opening and closing a port 56, at the lowpoint of the melting pot to thereby control the supply of molten metalto the chamber 47 as is well understood in this art. The means foroperating the metal flow valve 54 and for admitting fluid pressure tothe chamber 47 for the purpose of squirting a charge of molten metalthrough the nozzle 52, will be described hereinafter.

Referring now to the second group of apparatus. viz: the die members andtheir supporting and cooperating parts, it will be observed that theseand likewise the core-pulling devices or apparatus are co-ordinated on acarriage which is slidable horizontally on the base forwardly toward themelting pot on the base 27 and carrying a. rigid upstand ing carriageframe designated generally by 59. This carriage frame has side walls 61and 62, joined by a front wall 63. The upper end of the carriage frameis braced by vertical brace rods 64 connected at their lower ends to thecarriage base and at their upper ends through the agency of a bracket 65to the carriage frame. The front wall 63 of the carriage frame hasvertical dove-tail ways 66 upon which upper and lower crossheadsdesignated generally by 67 and 68 respectively, are vertically slidable.Each cross-head has a horizontal portion 69 to which one or more diemembers are adapted to be bolted or otherwise secured. In the presentexample. I have shown for purpose of illustration, die members 71 and 72disposed intermediate and bolted to the horizontal portions 69 of thecross-heads 67 and 68 respectively. The casting formed in the mold thusprovided is indicated by 75. The molten metal will be injected into themold through the ingate 76, Fig. 9, as described later. It will, ofcourse, be understood that the present dies are simply for purpose ofillustration.

Mechanism is now the cross-heads 67 and close and open the dies prises apair of cylinder cams 77 and 78 fixed to a vertical shaft 79 disposedintermediate the sides of the carriage frame and journaled in suitablebearings carried by brackets 81, fixed to said frame. The cams 77 and 78operate cross-head levers 82 and 83 respectively, through means ofsuitable roller and cam; connections, and said levers fulcrumedintermediate their ends at 84 on the carriage frame are respectivelyconnected by links 85 and 86 to the cross-heads 67 and 68. Said linksare adjustably connected by nuts 87 to the cross-head levers to vary theapproach of the cross-heads. The cam wayoneach cam is identical exceptthat they are reversed to simultaneously feed the cross-heads toward andaway from each other. A development of the cam 77 is shown in Fig. 6, inwhich the functions of the cam are specified. It will be understood,however, that this example is simply for purpose of illustration. Themechanism for driving the cam shaft 79 will be described hereinafter, itbeing sufficient to note at this point that when the machine is in theidle position shown in Fig. 1, the cross-heads and die members are inseparated relation held open by the cam portions 88. When the machine isstarted as will be described later. the cam portions 89 will close thedies and during the interval determined by the cam portion 91. a chargeof molten metal will be injected into the mold formed by the dies. Thecam portion 92 separates or opens the dies, and during this openingmovement the provided for moving 68 on the ways 66 to or mold. Thiscomcasting will be ejected from the die members by ejecting rods 93.These rods as shown in Figs. 5 and 13, pass through the horizontalportion 69 of the cross-heads and are attached to the ejector pin plateswhich they operate and are guided and controlled by brackets 94interposed between and fixed to the brace rods 64. Each ejector rod isequipped with a pair of inner lock nuts 95 and outer lock nuts 96positioned so that when the dies are closed as shown in Fig. 5, theywill ensure withdrawal of the ejector pins into proper position topermit the metal to be poured into the mold. When, however, the diemembers open, the nuts 95 will be brought into engagement with thebrackets 94, thereby causing the ejector pins to be projected into themold to eject the casting as the die members continue to separate. Theseejector rods and the pins controlled thereby will obviously be broughtinto proper relation to the die members when said die members are againclosed.

The core-pulling apparatus will now be described. reference being hadmore particularly to Figs. 9, 10, 12, 13 and 17. Upon the upright camshaft 79 is fixed a core-pulling cam 98, in the cam way of which islocated a follower roller 99 carried by a rack 101. This rack slidablysupported by the casting 102 fixedly mounted between and upon the sides61 and 62 of the carriage frame, is adapted to be moved back and forthby and radially of the cam 98. A spur pinion 103 meshing with said rackis fixed to a cross shaft 104 journaled in bearings carried by thebracket 102, which shaft is equipped at each end with a bevel gear 105.Each bevel gear 105 meshes with a complemental bevel gear 106 fixed to asleeve 107 suitably journaled on the carriage frame. Each sleeve 107drives through intermediate mechanism, a. pair of core-pulling deviceslocated on the adjacent side of the carriage frame, one core-pullingdevice being provided for each end of a die member. Inasmuch as thecorepulling apparatus at each side of the machine is similar, adescription of one will apply to both. As shown in Fig. 17, the sleeve107 is provided at its other end with a fixed spur insert 111. Ashiftable clutch-112 splined on the shaft 108 extending through thesleeve and having clutch teeth complemental to those on the gear 109, isadapted to be movedinto and out of engagement with the latter. Aspring-pressed ball 113 serves by engagement in either of the notches114 or 115 to locate and hold the shiftable element- 112 in the clutchengaged or disengaged position. The gear 109 drives a spur gear 116loose on a shaft 117 in turn journaled on the carriage frame. Drivingconnection between the gear 116 and the shaft 117 may be established atwill by means of the manugear 109 carrying a clutch tooth 79, (whichidly mounted on ally shiftable clutch element 118 similar inconstruction and operation to the clutch element 112 just described.Each shaft 108 and 117 is adapted to operate a core-pulling devicecomprising as shown in Figs. 9 and 13, a. core element 119 connected toa rack member 121 slidably mounted on a bracket 122 fixed to itsrespective cross-head. The connection between each of said shafts 108and 117 and its core-pulling rack comprises a pinion 123 meshing withsaid rack, and telescoping shaft members 124 connected at opposite endsby means of universal joints 125 to the pinion 123 and its respectivedriving shaft. From the foregoing, it will be manifest, with the partsin the core-inserted position shown in said figures, that when the cam98 is revolved in a clockwise direction vie-wing Fig. 9, the operatingtrains between said cam and the several core elements will be operatedto simultaneously pull the cores. That is, the rack 101 will be drawninwardly, thereby revolving the gears 105, 106, 109 and 116 and theshaft connections between the latter two gears and the core-pullingpinions and racks. Any one core-pulling device may obviously bedisconnected from this driving mechanism by disconnecting its respectivetoothed Clutch. Furthermore, the timing of the core-pulling operation ofany core element with respect to other operations, may be varied simplyby withdrawing the selected clutch element and rotatably adjusting itwith respect to its driving gear. It follows, therefore, that inasmuchas the core-pulling cam is driven by the cam shaft as will be presentlyseen is driven in timed relation with the mechanism for feeding the diecarriage into and out of nozzle tension position) said adjustmentenables the cores to be pulled either before or during separation of thedies, or at any time governed by the circumstances of any particularjob.

Coming now to the drive mechanism, it will be observed that this iscarried by a supplemental base bracket 119, in turn rigthe main base atthe end opposite from the melting pot. Said mechanism includes a drivingfriction clutch pulley 80 loose on a driven shaft 90 in turn suitablyjournaled in bearings 100 carried by the supplemental base part. Thisclutch pulley, of a standard construction, is adapted to be engaged bythe expanding action of a pair of levers 110. A shiftable clutch cone120 on the shaft 90 is employed for expanding the arms 110, said clutchcone being operated by fluid pressure as shown in Fig. 22. The fluidpressure (air) clutch includes an guter cylinder body 126 fixedlysupported cylin der wall 128. uponwhich a piston 129 is reciprocable.-The piston is equipped at its head with cup leathers 131 secured in abracket 127 and carrying an inner position by a cup ring 132, and at itsup posite end is connected to the clutch cone 120. A cylindrical head133 threadingly engaged on the outer cylinder body, carries a suitablestufiing box sealing the piston passage. Air pressure may be admitted toopposite ends of the cylinder through passages 134 and 135 for movingthe piston back and forth. The shaft 90 carries a worm 136 meshing witha worm gear 137 journaled in a casing 138 and held against axialtranslation therein. 1 shaft 139 splined and supported at one end in thehub of the worm gear 137 is journaled at its opposite end in a bearing141 carried by the carriage'frame. The shaft 139 in turn is held againstaxial translation in the bearing 141, and conse ucntly travels with thecarriage frame. aid shaft'139 carries a cylinder cam 142, a developmentof which is shown in Fig. 7. In the annular cam way of this cam islocated a roller 143 carried by a draw bar 144 adjustably secured to abracket 145 fixed to the supplemental base part 119. By rotation of thecam 142 through engagement of the air clutch, just described, the diecarriage will be moved forwardly and backwardly on the base in the cyclenoted in Fig. 7. The shaft 139 carries at its forward end a fixed bevelgear 146 meshing with a bevel gear 147 fixed to the, vertical cam shaft79. Thus, the die opening and closing cams 77 and 78, the core-pullingcam 98, and the carriage feed cam are simultaneously driven from acommon driving means, and it follows that the cam-driven mechanism willbe operated in predetermined timed relation.

Said drive mechanism also drives a cam shaft 148 through the agency ofspur gears 149, 150 and 151, and said cam shaft carries an air injectorcam 152 and a metal flow cam 153, best shown in Figs. 4, 8 and 11. Aroller 154 following the cam 153 is carried bv a vertical lift rod155'urged downwardly by a spring 156, said lift rod being pivot allyconnected at its upper end to the metal flow valve lever 55 referred toabove. The cam 153 is designed to raise and lower the metal flow valve54 at the proper times. The cam 152 is designed to effect instantaneousinjection of air into the pressure end 48 of the pouring chamber 47described above. This cam operates a roller follower 157 and a fixedfollower 158, the latter of which is adapted to ride on a cam shoe 159.These followers attached to the lower end of a valve lifter or tappetrod 161, are urged downwardly against the cam surfaces by a spring 162.The tappet bar under control of the rotary cam just described, isdesigned to actuate an air injector valve comprising a pair of poppetvalves 163 and 164 carried in a casing 165 mounted on a bracket160carried by the fire-box 28. This cam raven? construction provides forquick opening of the air supply valve to effect instantaneous injectionof the molten metal into the mold. This quick action is obtained by theabrupt radial surface at the heel end of the cam shoe 159, permittingthe follower 158 to drop instantly and more rapidly than is possiblewith the ordinary cam and roller action; It will be seen that this quickcam action causes the upper tappet finger 166 on the tappet rod 161 toopen the spring-seating poppet valve 164 as shown in Fig. 18, allowingthe fluid pressure (air) to pass from the supply chamber 167 through thechamber 168 and the pipe 49 mentioned above, to the pressure end of thepouring chamber 47. thereby forcing a charge of metal from said pouringchamber, as shown 'in Figs. 2 and 3. The air pressure will, of course,be appropriate for the particular metal and shape of the casting so thatthe metal will be instantaneously forced into the mold. Subsequently,the cam 152 will raise the rod 161 causing the upper tappet finger 166to close the valve 164 to shut off the air supply and causing the lowertappet finger 169 to unseat the exhaust valve 163 to relieve thepressure on the metal in the pouring chamher;

The fluid clutch described above for putting the machine into and out ofoperation is controlled by manually and automatically operated valveswhich will now be described. This clutch shown in Fig. 22, is connectedby pipes 171 and 172 to a four-way valve comprising (Fig. 14) a casing173 and a retary valve 174 having passages 175 and 176 adapted toregister with the four passages in the casing 173. The valve-member 174may be manually oscillated by means of the control lever 177. The casing173 is also connected by pipes 178 and 179 to a valve casing 181 asshown in Figs. 14 and 19. Said casing 181 supported in a stationaryposi-' tion by a bracket 182 on the base, carries an upper and a lowerpair of spring-seating poppet valves 1834184 and 185-186. respectively.These valves are adapted to be actuated by upper and lower tappetfingers 187 and 188. carried by a tappet rod 189 vertically slidable inbearings 191 in the casing 181 and equipped at its lower end with aroller 192 adapted to he raisedand lowered by a cam 193 on the carriagebase 57. The air pressure taken into the casing 181 through theair-supply pipe 194 is adapted to be alternately delivered by action ofthe poppet valves to the pipes 178 and 179 according to the position ofthe tappet rod 189, and through said pipes to the four-way valve andthence to the fluid pressure clutch. I

These poppet valves comprise. in effect. an automatic reversing valve.The four-way valve is a manually operated reversing valve. The purposeof these valves is to enable the operator to put the machine intooperation by manipulation of the control lever 177 to engage the fluidpressure clutch, and to automatically disengage said clutch after acycle of operations by automatic action of the poppet valves. Referringnow more particularly to Figs. 1, 14 and 19, in which the clutch isdisengaged and the machine is in idle position, it will be seen that theroller 192 is elevated by the cam 193, thereby causing the tappet finger188 to open the valves 185 and 186. This permits the air pressure topass the valve 185 and communicate with the pipe 178 through ahorizontal passage 190, a vertical passage 195, and a second horizontalpassage 196 communicating directly with said pipe 178. iVith theposition of the control lever 177 as shown in Fig. 14, air pressure willbe admitted through the pipe 172 to the clutch, thereby disengaging thesame, as shown in Figs. 14' and 22, the exhaust passing back through thepipe 171, the passage 176 in the four-way valve, the pipe 179. the openvalve 186, and out through the exhaust port 197. When now it is desiredto engage the clutch to start the machine, the operator swings thecontrol lever 90 degrees in a counterclockwise direction viewing Fig.14. to the position shown in Fig. 15. This shifting of the four-wayvalve directs the supply pressure to the pipe 171 and the passage 134,Fig. 22, thereby forcing the piston to the opposite end of the cylinderand engaging the clutch. The air thus displaced by the piston passesback through the pipes 172179 and through the port 197 in the poppetvalve casing as shown in Fig. 15. The machine having been thus put in operation, the die carriage will be fed forwardly until the roller 192rides off the cam 193, thereby lowering the tappet rod 189 and reversingthe action of the poppet valves. as shown in Fig. 16; but the effect ofthis reversing action on the clutch is precluded by the operatorswinging the control lever from the position shown in Fig. 15 to that inFig. 16. That is. the upper poppet valves 183 and 184 will be opened bythe tappet finger 187 and the lower poppet valves will be closed bytheir respective springs. The air will pass through the valve 183, and ahorizontal passage 198 in the valve casing, down through a longitudinalpassage 199 and through a second horizontal passage 201 communicatingdirectly with the pipe 179. At this instant. it is necessary for theoperator to swing the control lever 177 to the position shown in Fig.16, to continue delivery of the air pressure from the pipe 179 to thepipe 171 to maintain the clutch engaged. In this position, the exhaustpasses back through the pipe 172, the four-way valve, up through thevalve 184 and exhausts through the port 202. This condition of the valvemaintains until the cycle has been completed, at which time the cam 193will lift the tappet rod 189, thereby reversing the poppet valves, asshown in Fig. 14, and causing the clutch to be disengaged. The cam 193may be adjusted on the carriage base to vary the stopping point, and insome 1nstances it is desirable to employ more than one cam on thecarriage base, such for example as the cam 203 indicated in dotted linesin Fig. 1, for the purpose of stopping the forward travel of the diecarriage before the nozzle is reached and the dies closed. for thepurpose of inserting a special core or other hand-operated device in themold. It should be understood. however, that my invention is in no waylimited to the particular form of valve mechanism for controlling thefluid pressure clutch, as other forms might be employed to the same end.

A complete cycle of operations is as follows, reference being hadparticularly to Figs. 6, 7 and 10, which plainly show the action of thedie closing and opening cam, the carriage-feed cam and the core-pullingcam respectively, and the co-operative relation of these cam functions.The idle position is shown in Fig. 1; and when the operator desires tostart the machine, he swings the control lever 177 to the position shownin Fig. 15, and then back to the position shown in Fig. 16 as describedabove, for the purpose of engaging the fluid pressure clutch. Thiscauses all of the cams to be operated in positively timed relation. Thedie carriage will then be fed forwardly and at the same time the'diemembers will be moved together to close the mold. As shown in Figs. 6and 7 the dies will be closed prior to the nozzle tension position, socalled because the die box or rather the ingate portion thereof ispressed against the seat of the metal injecting nozzle 52, in whichposition the metal may be delivered through said nozzle into the mold.During the die closing movement the cores start in as indicated inFig.10, and after the nozzle tension position is reached, the airinjector cam 152-- 159 will open the air valve 164, Fig. 18. causing acharge of metal to be instantaneously squirted with proper pressurethrough the nozzle 52 into the mold. Before the cores start out. theexhaust valve 163 will be opened by the valve 152 to relieve thepressure on the metal in the pouring chamber, and subsequently thecarriage will be started backward to withdraw the dies from the nozzletension position. While the carriage is backing away, the dies will beopened and during this time the cores will be withdrawn. Thedies remainopen and the cores retracted during the idle position; and during thisidle period the metal flow valve 54 will be raised by its cam toreplenish the pouring chamber. It will be understood that thisparticular cycle of operations is for purpose of illustration merely andthat the invention comprehends appl1cation of the principles disclosedherein to suit the various conditions and requirements of differentdie-casting jobs for which a machine of this kind is intended.

As regards the relative location of the melting pot and the diecarriage, it will be observed that the dies are in fact only temporarilynear the melting pot, that is, during the nozzle tension position. Itfollows, therefore, that the temperature of the dles may be easilycontrolled and maintained at an even temperature, which is an importantfactor in the production of high grade die castings, and furthermore,the frame of the machine is notsubjected to excessive heat which wouldtend to warp and weaken its structure.

It is believed that the foregoing conveys a clear understanding of theobjects and principles prefaced above, and while I have illustrated buta single working embodiment, it should be understood that considerablechange might be made in the construction and arrangement withoutdeparting from the spirit and scope of the invention as expressed in theappended claims:

I claim:

1. In adie-casting machine, the combination of a stationary melting potand metal-injecting nozzle, and vertically sepa' -rable die membersremote from said melting pot and nozzle and adapted to be opened andclosed and to be moved laterally into and out of nozzle tensionposition.

2. Ina die-casting machine, the combination of a stationary melting pot,pouring chamber and nozzle, a horizontally movable carriage equippedwith separable die members. and mechanism for closing and opening thedie members and for moving the carriage horizontally to bring saidmembers into and out of a nozzle tension position.

3. In adie-casting machine. the combination of a melting pot, a. pouringchamber. a. stationary nozzle. vertically separabledie members. andmechanism, for closing and opening said die membersand for moving themhorizontally into and out of a nozzle tension position.

4. In a. die-casting machine, the combination of a base, a melting poton the base having a stationary metal-injecting nozzle, a carriageslidable horizontally on the base toward and from said nozzle, andvertically separable die members on the carriage adapted to be moved bythe latter into and mounted on and movable with said carriage, a diemember on each cross-head, means movable with the carriage for movingthe cross-heads in die closing and opening movements, and means formoving the carriage to bring the die members into and out of nozzletension position.

6. In a die-casting machine, the combination of a melting. pot, ametal-injecting nozzle, a reciproeable carriage, separable die memberson said carriage, cam-operated means movablewit-h the carriage forclosing and opening the die members, and means for relatively moving thedie members and said nozzle to bring said parts into and out of nozzletension position.

7. In a die-casting machine, the combination of a stationary melting pothaving a metal injecting nozzle, a horizontally movable carriage,separable die members on the carriage, a rotary cam for moving each diemember from an open to a closed position, and a rotary cam for movingsaid carriage to carry the die members into and out of nozzle tensionposition.

8. In a die-casting machine, the combination of a melting pot, ametal-injecting nozzle, a carriage horizontally slidable toward and fromsaid nozzle, a pair of cross-heads vertically slidable on the carriage,a. die member on each cross-head, a vertical cam shaft on the carriage,cams on said shaft, means operated by said cams for vertically movingsaid cross-heads to close and open the die members, and means for movingsaid carriage into and out of nozzle tension position.

9. In a die-casting machine, the combination of a base, a stationarymelting pot on said base equipped with a metal-injecting nozzle, anupright carriage horizontally slidable onthe base toward and from themelting pot, upper and lower cross-heads vertically slidable onthecarriage, a die member carried by. each cross-head, a crosshead leveron the carriage for vertically moving each cross-head. cam means on thecarriage for rocking said levers to close and open the die members, anddrive mechanism on the base for operating said cam means and for movingthe carriage into and out of nozzle tension position.

10. In a die-casting machine, the combination of a base, a stationarymelting pot on said base equipped with a metal-injecting nozzle, anupright carriage horizontally slidable on the base toward and from themelting pot. upper and lower cross-heads vertically slidable on thecarriage, a die member carried by each cross-head. a crosshead lever onthe carriage for vertically moving each cross-head, cam means on thecarriage t'or rocking said levers to close and open the die members.drive mechanism on the base. a cam shaft associated with the carriageand driven by said mechanism, a cam on said shaft for moving thecarriage horizontally, and a driving connection between said sha'ft andsaid die-operating cam means.

11. In a die-casting machine, the combination of a base, a melting potand metalinjecting nozzle stationary on the base, drive mechanism on thebase, a carriage movable on the base toward and from the melting pot andhaving separable die members, and cams traveling with the carriage andoperated by said drive mechanism for closing and opening the die membersand't'or mov ing the carriage to and from the nozzletension position.

12. In a die-casting machine, the combination of a base, a melting potand metalinjecting nozzle stationary on the base, drive mechanism on thebase, a carriage movable on the base toward and from the melting pot andhaving separable die members, cams traveling with the carriage andoperated by said drive mechanism for closing and opening the die membersand for movin the carriage to and from the nozzle tension position, andcontrol means for said drive mechanism operated in part by movement ofthe carriage.

13. In a die-casting machine, the combination of a stationary meltingpot, a carriage movable toward and from the melting pot and equippedwith separable die mem bers and core-pulling mechanism, a carriage feedcam, a die opening and closing cam and a core-pulling cam carried bysaid carriage, and driving means for operating said cams.

14. In a die-casting machine, the combination of a stationary meltingpot, a carriage movable toward and from the melting pot and equippedwith separable die members and core-pulling mechanism. a carriage feedcam, a die opening and closing cam, and a core-pulling cam, both mountedon and movable with said carriage, and driving means for operating saidcams including a fluid pressure clutch.

15. In a die-casting machine, the combination of a pouring chamberhaving an air pressure end and a nozzle end, an air injector valveconnected with said pressure end, a carriage movable toward and fromsaid nozzle end and equipped with separable die members and core-pullingmechanism, a cam for operating said injector valve, :1 carriage feedcam. a rotary die opening and closing cam and a rotary core-pulling cammounted on said carriage, and drive means for operating said earns.

16. In a die-casting machine, the combination of a pouring chamberhaving an air pressure end and a nozzle end, an air injector valveconnected with said pressureend.

a carriage movable toward and from said nation of separable die'members,means. for

closing and opening said die members, a core-pulling device movable witheach d e member, and means for operating said corepulling devices topull the cores, said means including an adjustment whereby the cores maybe timed to pull either beforeor during separation of said die members.

18; Ina die-casting. machine, the coinbi-.

nation of separable die members, means for closing and opening said diemembers, a core-pulling device movable with each die member, a pair ofintermeshing gears, an operating c'onnection between each gear and oneof said core-pulling devices, and means for driving one of said gears tooperate both core-pulling devices.

19. In a d1e-cast1ng machine, the combination of separable die members,means for closing and opening said die members, a core-pulling devicemovable with each die member, a pair of intermeshing gears an operatingconnection between each gearand one of said core-pulling devices,means'for driving one of said gears to'operate both core-pullingdevices, means for operating said die closing and opening means and saidcore-pulling driving means in timed relation, and means for varying saidtimed relation to cause the core-pulling devices ,to pull the cores atrelatively diflerent times with respect to the movement of the diemembers.

20. In a die-casting machine, the combination of separable die members,a'corepulling device for each die member. intermeshing gears, a drivingconnection between each gear andone of said core-pulling devices. andcam-operated means for driving one of said gears to simultaneouslyoperate said core-pulling devices.

21. In a die-casting machine, the combination of separable die members,a corepulling device movable with each die memher, a pairofintern'ieshing gears, a driving connection between each gear and oneof said core-pulling devices, andmeans for driving one of said gears,whereby to operate both core-pulling devices in unison.

22. In a die-casting machine, the combination of relatively movable diemembers. a core-pulling device movable with one of the die members, adrive shaft, and an extensible shaft having a universal connection atone end with said core-pulling device and another at its opposite endwith said drive shaft, and adapted for operatingsaid core-pulling deviceat any position of the die member or during movement thereof. a 23'. Ina die-casting machine, the combination of a metal-injecting nozzle, acarriage movable toward and from said nozzle and equipped with a pair ofseparable die members, a core-pulling device associated With each diemember, mechanism for closing and opening the die members and for movingthe carriage into and out of nozzle tension position, and a cam carriedby said carriage ,for operating said core-pulling devices.

24. In a die-casting machine, the-combination of a metal-in ectingnozzle, a carriage -movable toward and .from said nozzle and equippedwitha pair of separable die member", a core-pulling device associatedwith each die member, mechanism for closing. and opening the die membersand for moving the carriage into and out of nozzle tension position, andmeans mounted on the carriage for operating said core-pulling devicesaid means being adjustable to pull the cores either before or duringseparation ofthe die members. v

- 25. In a die-casting machine. the combination with die members,core-pulling mechanism comprising a core-pulling member associated witheach die member, a rack on each core-pulling member, a pinion meshingwith each rack, a pair of intermeshing "driving gears, and a drivingconnection between each driving gear and one of said pinions.

26. In a die-casting machine, the combination with die members,core-pulling mechanism comprising a core-pulling member associated witheach die member, a rack on each core-pulling member, a pinion meshingwith each rack, a pair of intermeshing drivrack, a pair of 'intermeshingdriving gears,

and a driving connection between each driving gear and one of saidpinions, each connection including means for relatively ro tatablyadjusting its pinion and driving gear.

28. In a die-casting machine, the combination of a metal-injectingnozzle, a carriage movable toward and from saidv nozzle, a pair ofseparable die members on said carriage, a core-pulling device movablewith each die member. means for closing and opening the die members,means for moving the carriage into and out of nozzle tension position,and means carried by the carriage tion of separable die members, acore-pulling device, means for closing and opening the die members, andmeansfor operating said core-pullin device to pull the core at apredetermine time in relation to closing and opening the die memberssaid means including adjustable mechanism for vary-.'

ing the time at which said core will be pulled.

30. In a die-castin machine, the combinaof a pair of separab e diemembers, a core pulling device at each end of each die member, a pair ofintermeshing gears for both the core-pulling devices at each end of saiddie members, connections between each pair of gears and its respectivecore-pulling devices, and a common means for driving said gears tooperate the core-pulling devices. v

31. In a die-casting machine, the combination of a pair of separable diemembers, a core-pulling device at each end of each die member, a pair ofintermeshing gears for both the core-pulling devices at each end of saiddie members, connections between each pair of gears and its respectivecore-pulling devices, a core-pulling cam, and means oper .ated by saidcam and in driving connection with one gear of each pair, whereby saidcore-pulling devices will be operated from said cam.

32. In a die-casting machine, the combination of a stationary meltingpot having a metal-injecting nozzle, a carriage movable toward and fromsaid nozzle, a pair of separable die members on. said carriage, acore-pulling device movable with each die member, means for closing andopening the die members, means for moving the carriage into and out ofnozzle tension position, and means on the carriage for operating thecore-pulling device in predetermined time relation with said die andcarriage moving means said means including an adjustable clutch forvarying the time of operation of said core pulling device.

33. In a die-casting machine, the combination of a stationary meltingpot having a metal-injecting nozzle, a carriage movable toward and fromsaid nozzle, a pair of separable die members on said carriage, acore-pulling device movable with each die member, adjustable means forvarying the time of operation of said devices, means for closing andopening the die members, means for moving the carriage into and out ofnozzle tension position, and drivin mechanism for operating said die,carriage and core-pulling operating means including a fluid pressureclutch.

34. In a die-casting machine, the combination'of a melting pot, ametal-injecting nozzle, a carriage equipped with separable die membersand movable with respect to said nozzle into and out of nozzle tensionposition, mechanism including rotary cams for closin and opening the diemembers and moving t e carriage into and out of said nozzle tensionposition, and fluid pressure control means includin a fluid pressureclutch for controlling said mechanism.

35. In a die-casting machine, the combination of a melting pot, apouring chamber having a nozzle, a metal flow valve between said pot andchamber, means for admitting fluid'pressure to the chamber for injectinga charge of metal, a carriage movable to-' ward and from the nozzle andequipped with separable die members, a control member, mechanismrendered operable by said control member for automatically closing thedie members, moving the carriage forwardly to a nozzle tension position,opening said metal flow valve admitting fluid pressure to said chamber,retracting said carriage and opening the die members, and means forautomatically stopping the mechanism at the end of the cycle.

36. In a die-casting machine, the combination of abase, a melting potand accessories therefor mounted on one end of the base, drive mechanismmounted on the opposite end ofthe base, a carriage slidable horizontallyon the base intermediate said melting pot'and drive mechanism andcarrying separable die members, and means including I WILLIAM a. HEiNzE.

